1材料与方法在河北省承德市围场县御道口乡及丰宁县鱼儿山镇设立的2个固定鼠疫监测点每年均开展监测工作。主要宿主动物达乌尔黄鼠调查按各类生态面积0.5%的比例分层抽样在4~7月按1 hm2/d弓形夹法各监测一次。对疫源地其他啮齿动物采用5 m夹线法进行调查。对重点地区的啮齿动物采用夹日法或其他捕鼠 1 Materials and Methods Two fixed plague surveillance sites in Yandokou Township, Weichang County, Chengde City, Hebei Province and Fish Hill Town, Fengning County, were monitored annually. The main host animal Daurian ground squirrel survey according to the proportion of 0.5% of various types of ecological area stratified sampling in April to July by 1 hm2 / d bow clamp method of monitoring once. Other rodents in the foci were surveyed by the 5 m line method. Rodents in key areas using the Japanese law or other catch rat